KR20000023787A - Method for transmitting super imposed image data in a radio frequency communication system - Google Patents

Abstract

PURPOSE: A method for transferring superimposed image data in radio frequency communication system is provided to reduce memory request, bandwidth request, power consumption and broadcasting time to enhance the efficiency of image communication. CONSTITUTION: A method for transferring superimposed image data in radio frequency communication system comprises (a) a step storing an original image in an image transfer unit(20), (b) a step transferring the original image to an image receipt unit(60), (c) a step storing the original image in the image receipt unit, (d) a step forming a revise image, (e) a step storing the revise image in the image transfer unit, (f) a step forming a difference image, (g) a step transferring the difference image to the image receipt unit, (h) a step reproducing the revise image by adding the difference image to the original image, and (i) a step storing the revise image in the image receipt unit.

Description

METHOOD FOR TRANSMITTING SUPER IMPOSED IMAGE DATA IN A RADIO FREQUENCY COMMUNICATION SYSTEM}

Multimedia applications are an integral part of the design of wireless communication systems. The application is aggregated into images, data, and voice in the same communication channel. What multimedia specifies is image transfer. An image is one that contains a two-dimensional signal that represents the relative luminance of an object in the scene. The scene is for example radar image for weather forecast purposes. Or X-ray images, or video images, or photographs. The main variables here are the quality and sharpness of the image resulting from the transmission of the image data.

A typical image consists of a matrix of 512 x 512 pixels. For non-chromatic images, each pixel is written at the gray (gray) level and uses 8 bits memory to store the information. The result is that the entire image occupies approximately 2 Mbits. For color images, each pixel uses 24 bits, resulting in an image occupying approximately 6 Mbits. Thus, full-detail color images generally require a lot of memory, bandwidth and power consumption. As a natural result of technology development, there is a growing interest in the transmission of multimedia signals by radio frequency communication. In the near future, these communication media will be part of the major services required for radio frequency communication systems. By the way, similar to wireless communication systems, radio frequency systems are subject to certain limitations. In addition, service prices in terms of air time charges are quite high for consumers. Images generally occupy large amounts of device memory and transmission of image signals takes a correspondingly long time. This is substantially expensive by transmitting images via radio frequency systems such as mobile cellular radio networks. This means is not wasteful if high resolution image transfer is not required. The same requirement applies if the original transmitted image is to be resubmitted and resent. Thus, the system needs to be able to minimize the broadcast time needed to transmit the image via the radio frequency system to minimize the cost to the user.

TECHNICAL FIELD The present invention relates to a wireless communication system, and more particularly, to a method for transmitting multiresolution image data of superimposed images by a wireless device to a radio frequency communication system.

1 is a block diagram of a system structure necessary to implement the method of the present invention comprising an image transfer unit for transferring an image to an image receiving unit by a communication medium.

2 is a block diagram of an image transfer unit of a method and system implemented by the present invention illustrating the interaction between the basic components of the unit.

3 is a block diagram of an image receiving unit of a method and system implemented by the present invention illustrating the interaction between the basic components of the unit.

4 is a flowchart for explaining the operation of the image transfer unit of the present invention.

5 is a flowchart for explaining the operation of the image receiving unit of the present invention.

Fig. 6 is a block diagram of a general system structure required for implementing the method of the present invention, which illustrates that an image transmitting unit and an image receiving unit are combined into one combined image transmitting / receiving unit so that both sides of communication can transmit and receive images. .

7 is a block diagram of a combination image transmission / reception unit for both transmission and reception of an image according to the method of the present invention.

8 is a flowchart for explaining the operation of the combined image transmission / reception unit of the present invention.

The present invention relates to a method for transmitting multi-resolution image data of superimposed images by a wireless device in a radio frequency communication system.

The superimposed image method is used in communication systems that can be reclaimed after the original image has already been transmitted. The revision is basically a change superimposed on top of the original image that together form the Levis image. Since the original image has already been transmitted, only the Levi's part of the original image becomes more efficient at transmitting to the receiving side. Thus, for the Levi's image, the image transfer unit determines the difference between the original image and the Levi's image, and transmits only the difference portion as a difference image. The other image contains only the revisions that overlap the original image.

When the star image is transmitted, the image receiving unit superimposes the star image on top of the previously received original image. The data of the two superimposed images are combined, and the image input unit is re-formed at the image transfer unit. For example, the original image is assumed to contain handwritten notes. After the note is sent to the receiving end, let's say it's added and signed and resubmitted. Here, the difference between the two images will be the signature that forms the stellar image. Instead of sending the entire signed note, only the signature is sent. Once the signature is sent, it is resynthesized into the unsigned note to form the next signed note (Levi image). Therefore, the superimposed image method has an effect of significantly reducing resources such as bandwidth, memory, power consumption, and broadcast time by erasing excess image data.

However, the effect of the superimposed image method is further increased by using the superimposed image method of the multi-resolution image system. Multi-resolution systems use wavelet techniques to decompose the image and separate the information blocks in the image transfer unit to store the image. An information block has a base image that represents the lowest image resolution and one or more image details that are added to the base image to provide increased resolution. The maximum number of resolutions at which an image is decomposed can be determined by the artificial limitations of the image transmission unit by the transmission side or by the limit resolution of the image transmission unit.

After establishing the communication channel, the base image is transmitted to the image receiving unit. The base image is the lowest resolution suitable for either the original image or the stellar image. The image accommodating unit is provided with means for transmitting the image data required by the image receiving unit to increase the resolution of the base image. Next, additional image details are transferred to the image receiving unit. The additional image detail received by the image receiving unit is then synthesized into the base image to again produce high resolution image detail using wavelet technology. The image receiving unit will be able to send what is needed for additional image details. At each time, additional image detail is composited with the previous image to provide new image details with high resolution.

The advantage of decomposing an image with increased resolution is that only those of the resolution needed to provide a consistent image and a clear image are transmitted. For example, an image such as a handwritten note may only need low or medium level image resolution for clarity. Low resolution delivery saves bandwidth, power, and transmission time. Images such as signatures or fingerprints may require the high resolution to be valid for the purpose at the receiving party. In this case, the receiving side may require a high level of resolution.

When the superimposed image system is combined with a multi-resolution image system, the resolution of each transmitted image can be made to meet the needs of the receiver. Thus, in succession to the above example, a handwritten note may be transmitted and reorganized in the image receiving unit at a receivable resolution using a multi-resolution image system. Next, the signed note is revised. In the superimposed image system, the extraneous image contains a signature and is transmitted in the same way as the original image, and the signature also receives a multi-resolution transmission. Here, the signature may be higher resolution than the note itself. Thus, the user of the image receiving unit would like to have additional image details on top of the signature base image that is more than necessary for the original note. Thus, the original image (note) is combined with the stellar image (signature) at different resolutions to form a custom version of the Levis image.

Using multiple resolution image data systems for superimposed images, the resolution of each component of the image or the required level of each image is determined by the communication side or at the resolution limit of the communication device. Applications of this concept include the transmission of images from hand-held cellular radio devices to hand cellular radio devices from laptop computers connected via an interface.

Thus, the main advantage of the method of the present invention is that the air time, bandwidth, power consumption, and other thresholds associated with radio frequency communication, while the device user determines the optimal resolution level of the image suitable for that need. The element can be minimized.

1 is a diagram showing a basic embodiment of the multi-resolution superimposed image data transmission system 10 of the present invention. The superimposed image transmission system of the present invention is particularly adapted to the sequence transmission of correlation images. More specifically, the superimposed image system is to transmit the original image in succession and subsequently allow the transfer of a modified version of the original image.

The original image is transmitted first to the receiving unit in its entirety. If the original image is subsequently changed, a new repetition of the image is compared with the previously transmitted image to obtain a different portion thereof. Next, a portion different between the new repeated image and the previously transmitted image is transmitted to the receiving unit. Since only the different parts are transferred between images, this process can significantly reduce the amount of data required for transmission, making more efficient use of bandwidth, reducing transmission time, and reducing transmission costs.

When the multi-resolution image transmission system is combined with the superimposed image transmission system of the present invention, more optimal image transmission can be obtained. The multi-resolution image system can independently control the resolution of each image transmitted to the receiving unit. This is to have the original image as well as the difference between the new repeated transmission image and the previously transmitted image.

Using multi-resolution capability, the image is blocked or decomposed into a base image (which can be visualized like a grainy photograph) and multiple image details. If the image detail is then added to the Granny photograph, the photograph becomes sharper. Once all image details are added to the base image, the original photograph is reconstructed. Thus, if the image is decomposed before being sent to the receiving unit, the image transmission starts with the base image sent to the receiving unit. The receiving unit user then asks for additional details to be transmitted and added to the base image. Thus, when the receiving unit user reaches the point of image resolution suitable for the purpose, there is no need for additional details.

In a multi-resolution image system, a full detail image may not be needed and there may be no transmission. Thus, this process significantly reduces the amount of data transmitted for each image. Since this process is applied to the original image as a difference between the previously transmitted image and the new repeated transmission image of the overlapping image system, the available bandwidth is utilized more efficiently, the transmission time is lower, and the transmission cost is reduced. It is further lowered.

The user of the image transmission unit 20 can instruct the designated image accommodation unit 60 that can accommodate multiple resolution image data. In practice, an example of this imposed limitation in a wireless telephony communication system is at the point where a user of the image transmission unit 20 programs an arbitrary authorized telephone number on the device. As a result, the caller from the designated telephone number with the image receiving unit 60 has complete multi-resolution image data capable of receiving. Callers from numbers other than those specifically authorized by the user of the image transfer unit 20 may not have image data or image data at a preset level of resolution. Receive any one of Thus, blocking of all image data transmissions includes a security feature that prevents reception of images by unauthorized parties. Sending only the base image to an unauthorized number may also have a similar secret effect. By the way, the transmission of a certain high level resolution, such as the base image synthesized to the multiple image details, can be set by the user of the image transmission unit 20 to limit the broadcast time required for the transmission. The user of the image transmission unit 20 may decide that the intermediate level resolution is all that is necessary for the receiving side and transmit only this level. Therefore, this option will also help to encrypt and optimize the transfer time parameters in bandwidth, power and image transfer.

1 illustrates the basic elements of a multi-resolution superimposed image data transmission system 10. The basic element is to have a communication medium 110 which provides a communication link between the image transmission unit 20, the image receiving unit 60, the image transmission unit 20 and the image receiving unit 60. In a simple form, the image transmission unit 20 takes an image into the system and manipulates the image before transmitting the image to the image receiving unit 60 via the communication media 110. Here, "manipulation" of an image is based on application to either or both of an overlapping image system and a multiple resolution image system. The image receiving unit 60 then cancels the manipulation performed by the image transmitting unit 20 on the image and displays the image on the side receiving the image.

The image transmission unit 20 includes an image input device 22, a superimposed difference unit 25, a decomposition unit 35, an encryption unit 45, and a communication unit 60. will be. The purpose of the image input device 22 is to input an image into the system. The image input device 22 sends an image output to the superimposed star unit 25. The superposed star unit 25 contrasts the image with respect to the previous image, and in some cases generates a differential image containing only revisions to the previous image. The decomposition unit 35 receives the outputs of the superimposed different kind unit 25 and decomposes the image for gradual transmission. The encryption unit 45 encrypts the image data prior to transmission. The communication unit 50 provides a two-way communication interface to the image receiving unit 60. The communication unit 50 transmits image data to the image receiving unit 60 and receives image data requests and other control signals from the image receiving unit 60.

The image receiving unit 60 includes a communication unit 65, a cryptographic translation unit 70, a retrofit unit 75, a superimposed combination unit 85, a display 95, and an image control unit 100. . The communication unit 65 allows the reception of image data from the image transfer unit 20 and the transfer of image data requests and other control signals to the image transfer unit 20. If the image is encrypted, the password translation unit 70 translates the password of the image data before sending the data to the decomposition unit 75. The reconstruction unit 75 recomposes the disassembled image prior to transmission. The superimposed combination unit 85 adds the extraneous image to the previous image so as to reproduce the image that has been Levi- ted to the image receiving unit 60. The image appears on the display 95.

The communication media 110 described in FIG. 1 includes means by which the image transmission unit 20 communicates with the image receiving unit 60. Although the communication means is not particular to the present invention, it may include the above method as a wired, radio frequency, infrared or microwave. A subclass of the communication means may be a channel dedicated between the image transmission unit 20 and the image receiving unit 60 for a specific role in communication. In the present invention, the radio frequency communication means plays its role.

2 is an enlarged view of the image transmission unit 20 in detail. The image input device 22 is one that is used to input an image into the system and may have, for example, a disc reader, a scanner, a whiteboard (with a scanner), or an electronic drawing pad. Once the image is entered into the system, it is controlled by the superimposed star unit 25. The superimposed stellar unit 25 determines the difference between two consecutive images in the revised sequence, thereby forming an image containing only the revised or stellar image. The new or original image is not controlled by the superimposed star unit 25. The purpose of creating a stellar image is to prevent sending the entire Levised image when a previous similar image has already been sent. Therefore, when only the different kind image is transmitted, the image that is recombined with the image previously transmitted to the image receiving unit 60 is re-formed.

The superposed heterogeneous unit 25 includes a data root switch 26, a working image memory 28, a comparison image memory 30, and an image processor 32. The data root switch 26 sends an image from the image input device 22 to the working image memory 28 and the comparison image memory 30. The unrevised image is sent to the working image memory 28 and the comparison image memory 30 is cleared. Only the revised image is passed to the working image memory 28. The image processor 32 compares the image in the comparison image memory with the image in the working image memory 28 and draws out the different parts to produce the stellar image.

The image from the superimposed stellar unit 25 of the original image or stellar image persists through the system to the decomposition unit 35. The purpose of the disassembly unit 35 is to prevent image down to the base image and one or more image details. This decomposition process is based on the multiple resolutions of the present invention. The coarsest resolution of an image (base image) is the initial image to be sent. The receiving side may require additional image details to improve the resolution of the base image.

The disassembly unit 35 has a main memory (ISU) 36, an image processor 38, a counter module 40, and a root switch 42. The main memory (ISU) 36 stores the images sent by the overlapping star units 25. The image processor 38 decomposes the image into separate information blocks having a base image and one or more detail images. The information block is then stored in main memory (ISU) 36. The counter module 40 is used to maintain a coefficient of the number of information blocks, corresponding to a particular image, transmitted by the image transmission unit 20. The root switch 42 controls the signal from the image receiving unit 60, which may include an image data request or reset signal. The image data is directed to the main memory (ISU) 36 from the corresponding information block which is advanced for transmission to the image receiving unit 60. The reset signal resets the counter module 40 and informs the image input device 22 that the image receiving unit 60 prepares to receive another image.

The cryptographic unit 45 includes a root switch 46 and a cryptographic device 48. If the contents of the image are confidential or proprietary, the image can be encrypted. This fact prevents the use of the image by the unauthorized side if an intercept of the image occurs during communication. The user indication operating parameters supplied to the image input device 22 determine whether the image is encrypted. If the image is encrypted, an encryption code is included in the image data. By the way, if it is not encrypted, the image passes unchanged through the cryptographic unit 45 via the root switch 46.

The communication unit 50 provides an interface to the communication media 110. The communication unit 50 includes a transmission module 52 and a reception module 54. The transmission module 52 transmits the image data to the image receiving unit 60. The receiver module 54 receives a control signal different from the image data request from the image receiving unit 60.

3 is a diagram illustrating the image receiving unit 60. The transmitted image data is received by the communication unit 65 of the image receiving unit 60. The communication unit 65 is provided with a transmission module 66 for sending an image data request or other control signal such as a reset signal to the image transmission unit 20 and a receiving module 68 for receiving the transmitted image.

Once the image data has been received by the receiver module 68, it is directed to the cryptographic analysis unit 70 where it is determined whether the data is encrypted by searching for an encryption code in the image data. The cryptographic analysis unit 70 is provided with a cryptographic analysis device 74 and a root switch 72 for encrypting encrypted data. If an encryption code is given, the image data is directed to the decryption device 74 at the point where it is to be interpreted. By the way, if the image is not encrypted, the image is sent by the switch 72 directly to the retrofit unit 75.

The purpose of the retrofit unit 75 is to resynthesize the image transmitted by the image transfer unit 20. The retrofit unit 75 includes a root switch 76, a main memory (IDU) 78, an auxiliary memory 80, and an image processor 82. The switch 76 directs the image data received into the main memory (IDU) 78 or the secondary memory 80. In general, the primary image is directed to main memory (IDU) 78 and the additional image details are directed to secondary memory 80. The image processor 82 synthesizes images stored in the main memory (IDU) 78 and image details stored in the auxiliary memory 80. The resulting detail image is then stored in main memory (IDU) 78 and can replace the image previously stored therein. Thus, the image detail establishes a higher resolution than the top of the previous image. The generated image is then directed to the superimposed combination unit 85.

The superimposed combination unit 85 includes a root switch 86, a full image memory 88, a partial image memory 90, and an image processor 92. The switch 86 sends the image from the retrofit unit 75 to either the full image memory 88 or the partial image memory 90. In general, the original image is directed to the full image memory 88 while the discrete image is directed to the partial image memory 90. The image processor 92 synthesizes the full image in the full image memory 88 and the dissimilar image in the partial image memory 92 to reproduce the Levit image. The Levit image is one that is stored in the entire image memory 88 and can replace the previously stored image.

The image control unit 100 serves to control the image transfer from the image transfer unit 20. The image control unit 100 is provided with a resolution level control device 102, a timer 104, a counter module 106, and a reset device 108. The resolution control device 102 is used to increase the resolution of an image received from the image transfer unit 20. Resolution control device 102 may include, for example, a simple push button. Pressing the button 102 causes the transfer module 66 to send an image data request to the image transfer unit 20. The counter module 106 is to maintain a count of the number of image data requests sent. A timer 104 is used to delay the transmission of the image data request so that a double press of the button 102 is gathered and sent as a single request. The reset device 108 resets the counter module 106 and sends a reset signal via the transfer module 66 to the image transfer unit 20.

The image control unit 100 sends an image data request to the image transfer unit 20 to start the image transfer process. The first data request signal generally generates a base image transmitted by the image transfer unit 20. After image observation by the receiving side, the image data request generates additional image details that are sent to the image receiving unit 60 to be composited with the previous image. If the receiving side is satisfied with the resolution of the transmitted image, the reset device 108 is activated.

Activation of the reset device 108 generates a reset signal and sends it to the image transfer unit 20. The reset signal instructs the image receiving unit 60 to prepare for receiving another image. The reset signal serves to send a signal to the image transmission unit 20, the second purpose of which the user of the image receiving unit 60 is satisfied with the previously transmitted image. Thus, the receiving side generally controls the transmission of the image data.

Action

Operations of the image transmission unit 20 and the image receiving unit 60 have been described with reference to FIGS. 4 and 5, respectively. At the beginning of communication, the first step is to establish the minimum level of resolution as shown in the receiving functional block 180 (FIG. 5) and the transmitting functional block 120 (FIG. 4). These parameters are used to progressively deliver multi-resolution image data, as described further below. In general, the minimum initial level of resolution is pre-adjusted by both users in both image receiving unit 60 and image transmitting unit 20. If the level specified on each side is different, the minimum value of the two values is the limiting initial parameter.

In addition to setting the minimum resolution level, the transmitting side may also specify the maximum resolution level available at the receiving side. The maximum level of resolution setting by the sender will be less than the resolution of the original image at the beginning of input into the system. For example, an image could be originally decomposed into a base image and seven additional image details. The transmitting side is to limit the maximum available resolution with four additional image details. Thus, the receiving side can only receive the maximum resolution of the base image with four additional image details, not the full resolution of the original image. This feature is useful where the transmitting side is searching to bear the communication cost and limit the broadcast time spent for image transmission.

After the maximum level of resolution has been established, the image to be transmitted is input to the image transfer unit (function block 122). As the image is entered into the system, other necessary operating parameters are also determined. The operating parameter may include, for example, whether the image is a revision to the previous image or the original image and whether the image is confidential. The defined parameter may be used to generate a control signal for the system or may be encoded into image data.

The image transfer unit 20 determines whether the image is the original image or the previous image (decision block 124). If the image is an unrevised original image, the root switch 26 is set in both the working image memory 28 and the comparison image memory 30 (function block 126). The image is stored in the working image memory 28 (function block 128) and the comparison image memory 30 is cleared (function block 130). From here, the original image is decomposed at the point where it is stored in the main memory 36. It is sent to the unit 35.

If the operating parameter indicates that the image is a revised image (decision block 124) or a revision to the original image, the root switch 26 is set only to the working image memory 28 (function block 132). Before storing the image that has been recalled in 28, the previous image stored in the working image memory 28 is first transferred to the comparison image memory 30 through the image processor 32. (Function block 134) When the transfer is completed The Levi's image is stored in the working image memory 28. (Function block 136) Next, the image processor 32 determines a difference between the Levi's image and the previous image to form another kind of image. (Function block 138 ) The star image is sent to the image resolution unit 35 at the point where it is stored in the main memory (ISU) 36. (Function block 140)

After the image is stored in the main memory (ISU) 36 of the disassembly unit 35, the image is decomposed by the image processor 38 into a reproduction information block which is stored again in the main memory (ISU) 36. (Function Block 142) may be decomposed using, for example, wavelet technology or another pyramidal image decomposition scale. Since the method is known in the art, no further explanation is given. Briefly, the original image S is decomposed into a base image S ₀ and a series of image details D ₁ , D ₂ ,... D _n . Both the base image S ₀ and the image details D ₁ , D ₂ ,... D _n are stored in the main memory ISU of the decomposition unit 35. The image details D ₁ , D ₂ ,... D _n are those that can be resynthesized with the base image S ₀ to provide a detail image. For example, S ₀ composited with D ₁ is to provide a detail image of one resolution level above the base image. Similarly, S ₀ composited with D ₁ and D ₂ is to provide two resolution levels of detail image over the base image. According to this concept, D ₁ , D ₂ ,. . . S ₀ composited with D _n gives the detail image the highest available resolution level corresponding to the maximum original resolution level. For a detailed description of wavelet technology, see IEEE Transactions on Pattern Analysis and Machine Intelligence (Vol. 11, No. 7, pp. 674-693), S. 1989, which is incorporated herein by reference. G. See A Theory for Multiresolution Signal Decomposition: The Wavelet Representation.

Real image transfer is initiated by an image data request from the image receiving unit 60. If an image data request is received by the image transfer unit 20 (judgment block 144), the image transfer unit 20 starts image transfer. In general, both the image data request and the reset signal may be transmitted via a dedicated control channel (DCC) such as a fast associated control channel (FACCH) or a slow associated control channel (SACCH). Since DCC has no transmission of image data, it may be utilized for signal transmission. An additional element requiring the DCC is that if there is a call while transmitting an image sequence, it is processed.

When the image data request is received by the image transfer unit 20 (decision block 144), the root switch 42 is set to the main memory (ISU) 36. (function block 146) Generally, the function block 148 Next, the image data request is processed and the request data is read for transmission to the image display unit 60. When the first image data request is received, main memory (ISU) 36 is directed towards the information block containing the base image. For sub-secret image data requests, main memory (ISU) 36 prepares an information block containing the next level of image detail in response to each image data request. If a request for multiple information blocks is received, the main memory (ISU) 36 synthesizes the required number of blocks in a sequential string corresponding to the increasing level of detail over the base image, or singles multiple details. (Function block 148) As indicated by function block 150, a request time for each image data is received so that the counter module 40 can determine the number of information blocks available for the image. It is to increase the count so as not to exceed the maximum level. In practice, the image transmission unit 20 may also transmit additional image details without first receiving an image data request from the image receiving unit 60. This is achieved through a separate disassembly control device incorporated in the image transfer unit 20. At any moment, the user of the image transmission unit 20 transmits additional image details in response to a verbal request from the user of the image receiving unit 60. Next, the control code notifies the image data of the image receiving unit 60 having the property of the imported data.

Once the data is recognized, the next image password will be generated prior to transmission. The image transmission unit 20 determines whether the image is confidential before the transmission of the image data. (Function block 152) If confidential, the root switch 46 is set in the encryption device 48 and the data is encrypted. (Function Blocks 154, 156) A confidential image may be provided with a confidential data, signature, dedicated plan that, for example, does not want the sender to be intercepted and does not want to be used outdoors and immediately called. If the image is not confidential, the root switch 46 is set to bypass the cryptographic device 48. (Default mode) In any way, the image data is transferred to the image receiving unit 60 for delivery to the image receiving unit 60. 52).

The image is gradually transmitted to the image receiving unit 60 as a discrete information block. When the image data request is received from the image receiving unit 60, the image transmitting unit 20 sends a response level of the image data to respond. In general, the base image is one that is sent in response to an initial image data request. These images are quite often orders of magnitude smaller than the original image. By the way, the initial image may also include the base image and one or more image details. In this case, the base image and the details are combined in the image transfer unit 20 prior to the transfer.

If more detail is required, the recipient can send additional image data requests (real time) for more detail. For each additional image data request, the image transfer unit 20 responds by sending an information block containing the next level of image detail. The counter module 40 maintains a count of the number of information blocks that are updated and transmitted at each transfer time. (Function Block 150) In the image receiving unit 60, image details are received to improve the base image and image resolution. The previous image detail is recombined. If a request for multiple image details is received by the image transmitting unit 20, the image receiving unit 60 before the corresponding number of information blocks containing the next level of image detail is resynthesized with the previous image to further increase the resolution. Is sent in sequence).

The transmission of the image continues until the final information block is received from the image receiving unit 60 or until the final information block is sent. The image transfer unit 20 determines whether a reset signal has been received at the function block 160. If no reset signal is received from the image receiving unit 60, or if the call is not closed, the main memory (ISU) 36 requests image data from the image receiving unit 60 until it reaches the maximum level of resolution. Continue to process However, if a reset signal is received, the root switch 42 is set to the image input device 22 / counter module 40 as indicated by function block 164. As a result, the image input device 22 informs the preparation of receiving the next image (function block 166) of the image receiving unit 60 and the reset of the counter module 40 (function block 168). Acceptance of the reset signal is also an indicator to the image transmission unit 20 in which the user of the image receiving unit 60 can accept the resolution of the previous image. If another image is sent (decision block 170), the next process resumes image input at function block 122.

If no other image has been sent, the call is terminated and the communication ends or the system waits to see if the user has decided to send another image (judgment block 172). If the call ends without a decision (judgment block 162), the counter parameter 40 is reset before the call ends (function block 174).

5, the operation of the image receiving unit 60 will be described in more detail. The delivery process initiates the transfer of the image data request from the image receiving unit 60 to the image transmission unit 20. This is done by activating the resolution level control device 102, which may include, for example, a push button pressed by the receiving side. The act of pushing the button 102 for the start time is to express the start image data request. When the start image data request is sent by the receiving unit 60 (decision block 184), the reconstruction unit 75 is set such that the import data is directed to the main memory (IDU) 78. ( Functional block 186) Basically, the minimum resolution image or base image is that required by the image receiving unit 60.

If additional image detail is demanded at the additional pressure of the button 102 (decision block 184), the root switch 76 is generally set to the secondary memory 80 before the subsecant image data request is delivered. Functional block 192) this indicates that the adaptation unit 75 for importing the image data is added to the existing image already received. As an additional explanation, activation of the button 102 for additional image detail leads to operation in three cases: the operation of the timer 104, an increment corresponding to the activity range of the button 102, is provided to the counter module 106. Register (function block 194), and set the root switch 76 to send additional details to be imported into the secondary memory 80 (function block 192). After the allocation time has elapsed, the timer 104 instructs the counter module 106 to send an image data request to the image transfer unit 20 corresponding to the increment registered by the counter module 106. For example, if button 102 is pressed twice, a request for two information blocks is sent via a dedicated control channel (DCC). Similarly, if button 102 is activated three times, image transfer unit 20 is required to deliver three information blocks containing additional image details. In both cases, the counter module 106 is incremented to maintain a count of the number of information blocks being requested. (Function blocks 188, 194)

Next, the required image data is received at the receiving module 68 of the communication unit 65. (Function Blocks 190, 196) As described above, the data is encoded in the direction toward an arbitrary process in the image receiving unit 60. Containing control information. Image data contains, for example, a sign indicating whether the image is an original image or another image. The code processes the image data and affects its transmission in the reconstruction unit 75 and the cryptographic interpretation unit 70.

If the image is encrypted as a result of the instruction of the transmitting side in the image input device 22, it appears as a sign having image data. If the data is encrypted (judgment block 198 for initial data request and judgment block 206 for additional image details), root switch 72 is set to cryptographic analysis device 74 to encrypt the image. The encryption device 74 has the property of reversing the encryption algorithm of the image transfer unit 20 and returning the data to the original unencrypted state. (Function block 202) 210, if the image data is not encrypted, the root switch 72 is set such that the image data bypasses the decryption device 74. The image data is then directed in the direction toward the retrofit unit 75.

The retrofit unit 75 resynthesizes the disassembled image prior to delivery. In operation, the initial or base image is processed and stored toward main memory (IDU) 78 to function to add additional detail. (Function block 204) A number of additional image details received and received upon request It is stored toward the secondary memory 80 and stored. (Function Block 212) When image details are received, the contents of both the main memory (IDU) 78 and the secondary memory 80 are converted into a single modified image in the image processor 82. (Function Block 214) A reconstructed image, referred to as a detail image, may have a base image that includes at least the base image but is resynthesized to all available image details (full resolution image). Thus, once renovated, the detail image is to be stored in main memory (IDU) 78 before being directed to the superimposed combination unit 85 (function block 216).

As mentioned above, the transmission of another image superimposed on the previously transmitted image is to form a Levit image as needed that does not have a full Levis image sent to the receiving side. Thus, depending on the image property specified by the transmitting side, the root switch 86 is set so that the image from the retrofit unit 75 is sent to the full image memory 88 or to the partial image memory 90. (Decision block 218) Generally, the original image is stored in the full image memory 88 (function blocks 220, 222), while the other image is stored in the partial image memory 90. (function blocks 224, 226) When another image is stored in the partial image memory 90, the next image processor 92 combines the image in the partial image memory 90 and the image in the entire image memory 88 so as to rebuild the Levis image. 228) The Levis image, also called the final image, is stored in the full image memory 88. (Function Block 230) Either the original image or the Levis image is the full image memory 88. After being stored in, the image is sent to the display 95 for marking by the receiving side (function block 232).

At the finally accepted resolution, the original image is composited with the star image at each iteration through resolution control. Thus, according to this systematic taxonomy, the final Levis image displayed on the display 95 may include an original image and multiple stellar images at differential resolution.

After receiving the image, the image receiving unit 60 is stationary and waits for the user to request additional detail (decision block 182), reset (decision block 234) or to close the call (decision block 236). If the user selects Reset after acquiring an acceptable resolution for the image, the image receiving unit 60 resets the counter module 106 and sends a reset signal to the image transfer unit 20. Function block 238 and 240 reset is also one in which more than the maximum number of details that will be simultaneously requested can be achieved by activation of button 102. Also, as the previous state, the transmission of the reset signal is an indicator for the image transmission unit 20 whose resolution of the previous image is acceptable to the user of the image receiving unit 60. From there, the process goes back to decision block 182 to wait for the user's judgment of the image receiving unit 60. If another image is received, the process resumes with the action of button 102 sending an image data request.

If the call is closed (decision block 236), the counter module 106 is reset (function block 242) and the final reset signal is passed to the image transfer unit 20 prior to the end of the call (function block 244).

The superimposed image transmission system of the present invention can be used in connection with or as a multi-resolution transmission system as described above. That is, the superimposed image system can operate independently of the multi resolution image system. Thus, in its basic form with the apparatus described above, the superimposed image system is taken in the original image via the image input device 22 of the image transfer unit 20. The original image is then transferred from the image transmission unit 20 to an image receiving unit in which the entire original image is displayed on the display 95. By pressing the reset device 108, the image receiving unit 60 sends a signal to the image transmitting unit 20 which is ready to receive the different image. When the Levi's image is input to the image input unit 22, the image transfer unit 20 determines the difference between the original image and the Levi's image and forms another kind of image. The other kind image is transmitted to the image receiving unit 60 which is re-combined with the original image previously transmitted. Once the stellar image is recombined with the original image, the resulting Levi's image appears on display 95.

An example of such a process is that the sender enters an unsigned handwritten note into the system via the image input unit 22 for transmission to the receiver. The sender is searching for the acknowledgment of the receiver. In this way, the unsigned handwritten note becomes the original image in the process of being stored in the working image memory 28. The sender receives the call approval of the note from the receiving side. Next, the sender signs handwritten notes and inputs them again through the image input unit 22. The original image (non-signature note) is first transmitted to the comparison image memory 30 and then the Levi's image (signature note) is stored in the working image memory 28. The image processor 32 determines the difference between the original image and the Levis image. In this example, the difference is the signature of the sender. Therefore, the stellar image formed by the image processor 32 is formed by the image processor 32 embedded only with the sender's signature. Since the note itself is already sent to the receiver, the components of the Levi's image do not need to be sent again. Therefore, the intention of this process is to save the image transmission time by sending only the signature, and reconstruct the next Levis image to resynthesize with the notes already received in the image receiving unit 60.

FIG. 6 is a functional block illustrating a combination of an image transmission unit 20 and an image receiving unit 60 to a single combination image transmission / reception unit 245 capable of receiving both transmit and receive multi-resolution superimposed image data. It is a diagram. Also, devices similar to this type are linked by communication media 110 as described above. The combined image transmission / reception unit 245 is shown in more detail in FIG. All components are as described separately for the image transmission unit 20 and the image receiving unit 60 as described with reference to FIGS. The only different component is a combination image transmission / reception unit comprising a root switch 256, a single receiver module 254, and a single transmission module 252, which are added to orient the image data collected at the receiver module 252. 245 is a dual purpose communication unit 250.

FIG. 8 is a view for explaining the operation of the combined image transmission / reception unit 245 showing FIGS. 6 and 7 in more detail. Separate processes for transmitting and receiving images have been described above with reference to FIGS. 4 and 5. The operation of this process is not described repeatedly. The combination of the image transmitting unit 20 and the image receiving unit 60 occurs in some interaction between the two units which are not needed individually. Only these features are discussed in further detail below.

As discussed above, a call between two similar devices is initiated by establishing the minimum level of resolution at which some images are transmitted or received as shown in function block 260. Next, for the combined image transmitting / receiving unit 245, it must be determined whether the unit transmits or receives the image (decision blocks 262, 264). Upon sending the decision block 262, the image input to the image input device 22 is stored in both the working image memory 28 and the entire image memory 88 (decision block 272 and function block 276). If it is an image (decision block 272), the conventional image in the working image memory 28 is first transferred to the comparison image memory 30 through the image processor 32. (Function block 282) Next, the Levis image is stored in the working image memory ( 28) and the full image memory 88 (function block 284) and the acquired stellar image (function block 286). The parameter defined by the user at the image input device 22 is also a route switch (S4) for directing current import data through the receiver module 254 to the transmission section of the combined image transmission / reception unit 245 ( 256). Alternatively, the modification and encryption functions are the same as described above, and if the reset signal is not received from the receiving side or the call is not closed, process processing until the image data request from the receiving side reaches the maximum level of resolution. (Starting at decision block 274) After the reset signal is received, the user sends another image (decision block 262), receives an image from the other side (decision block 264) or closes the call ( Decision block 266).

If another image is sent, the process will resume image input at function block 272. If no other image has been sent, the call is closed (judgment block 266) or the system waits to see if the user decides to send another image or receive an image. Note that if a reset signal has not been received at decision block 310, the call may also be closed (decision block 312). In another example, counter module 40 is reset prior to the end of the communication (function Block 268, 320)

When the user of the combined image transmission / reception unit 245 receives the image data (decision block 264), the image data request pushes the button 102 to the transmission side (decision block 322). The route switch (S4) 256 is directed so that the image data is directed to the receiver zone of the receiving unit 245. The receiver zone is operated in the same manner as described in FIG. When the image is displayed on the display 95, it is also directed back to the image input device 22 for revision, which is made and stored in the working image memory 28 to be recognized as a "original" image. If the resolution is not satisfactory after accepting the initial base image, the receiving side may press the button 102 to increase the resolution as before. This fact corresponds to the need for additional data as indicated by decision block 322.

The process of incrementally converting the resolution of an image is one that continues as specified above until the receiving end is satisfied or the maximum number of details is reached. As indicated at decision blocks 380 and 382, if a reset signal is not sent by the user, or if the call is not closed, the receiver zone merely shows the last image and the user has additional detail (judgment block 322), Require a reset or wait to close the call. If the user chooses to send a reset signal (judgment block 380), the counter module 106 is reset before the reset signal is sent (function block 386). (Function block 384) In addition, the reset signal is simultaneously requested. Note that it can be operated by activating the button 102 with more than the maximum number of details. Either way, the reset signal is to notify the transmitting side that the receiver zone is preparing to receive the next image and resets the counter module 40 of the transmitting device. As in the previous state, the transmission of the reset signal is also an indicator that the resolution of the previous image is acceptable at the receiving end. From here, the process proceeds back to decision blocks 262 and 264 to wait for the user's judgment of the combined image send / receive unit 245. If another image is received, the process resumes with the activation of button 102 sending an image data request. If no other image is required and the reset button is not reactivated, the call is closed (judgment block 382). In this example, the counter module 106 is reset (function block 388), and the final reset signal is called. Prior to the end of the communication will be transmitted to the other side.

The described method of transmitting a multi-resolution image for a superimposed image is to describe the increased level of efficiency that a party can realize in communication for determining the optimal level of resolution required when the superimposed image is communicated. The interactive nature of this method is also that one party optimizes the resolution of each image transmitted in multiple image sequences. Thus, this method results in significantly faster image transfer, especially when the user does not require the highest level of resolution. In addition, a single image is one that contains each different component at different resolutions. Therefore, when applied to radio frequency communications, this method serves to increase the efficiency of image communications by reducing memory requirements, bandwidth requirements, power consumption, and broadcast time.

It is to be understood that the present invention may, of course, be modified in the manner described herein without departing from the spirit and basic features thereof. Accordingly, the above embodiments are not intended to limit the invention, but include modifications and variations within the scope of the appended claims.

Claims (34)

A method of transmitting an overlapping image by a wireless device to a radio frequency communication system, the method comprising: (a) storing the original image in the image transfer unit; (b) transferring the original image from the image transmitting unit to the image receiving unit; (c) storing the original image in the image receiving unit; (d) revising the original image in the image transfer unit to form a Levit image; (e) storing the Levit image in the image transfer unit; (f) drawing different parts by contrasting the original image and the Levi's image to form a stellar image; (g) transmitting the separate image to the image receiving unit; (h) reproducing the Levi's image in the image receiving unit by adding the stellar image to the original image; (i) storing the Levit image in the image receiving unit. The superimposed image transfer method according to claim 1, wherein the original image and the sub secret Levit image are stored in a working image memory in an image transfer unit. 3. The superimposed image transfer according to claim 2, further comprising the step of transferring the final image to the work image memory to the image transfer unit from the image transfer unit to the comparison image memory when the sub-secret Levit image is stored in the work image memory. Way. 4. The method as claimed in claim 3, wherein the image processor in the image transfer unit compares the image in the comparison image memory with the image in the working image memory, and determines different portions between the images to form different images. The method of claim 1, wherein the original image and the sub secret Levit image are stored in the entire image memory in the image receiving unit. 6. The method of claim 5, wherein the stellar image is stored in the partial image memory in the image receiving unit. 7. The method of claim 6, wherein the image processor in the image receiving unit reproduces the Levit image by resynthesizing the image in the partial image memory and the image in the whole image memory. 8. The method of claim 7, wherein the Levi's image is stored in the entire image memory of the image receiving unit. 9. The method of claim 8, wherein the entire image memory is displayed in an image receiving unit. The method of claim 1, wherein the step of transferring the original image comprises: decomposing the original image into a base image and one or more image details; Transferring the basic image from the image transmitting unit to the image receiving unit; Receiving one or more additional data required from the image receiving unit; And transmitting additional image details from the image transmitting unit to the image receiving unit in response to the additional image data request. 11. The method of claim 10, wherein sending additional image data requests comprises sending multiple image data requests for multiple image details. 12. The method of claim 11, wherein transmitting additional image details comprises transmitting multiple image details in response to multiple image data requirements. 13. The method of claim 12, wherein transmitting multiple image details comprises compositing multiple image details prior to transmission to an image receiving unit. 13. The method of claim 12, wherein transmitting multiple image details comprises transmitting image details in a series of cryptographic information blocks. 11. The method of claim 10, comprising storing, in an image transmission unit, coefficients of the total number of image details transmitted to the image receiving unit. 16. The method of claim 15, wherein transmitting additional image details comprises determining the total number of image details transmitted prior to the image receiving unit, transmitting the next image detail, and increasing the overall coefficient. Nested image transfer method. A method for image transfer superimposed between an image transfer unit and an image reception unit, the method comprising: (a) decomposing the original image into an information block having a base image and at least one image detail; (b) storing the information block in the image transfer unit; (c) sending a first image data request from the image receiving unit to the image transmitting unit; (d) transmitting an information block containing a base image from the image transmission unit to the image receiving unit in response to the first image data request; (e) displaying the base image on the image receiving unit; (f) sending one or more additional image data requests from the image receiving unit to the image sending unit; (g) sending an additional block of information containing image details from the image sending unit to the image receiving unit in response to the additional image data request; (h) in the image receiving unit, synthesizing the base image and the previous image detail received by the image receiving unit to create a new detail image of higher resolution than the previous image; (i) displaying a new detail image on the image receiving unit; (j) regenerating the original image in the image transfer unit to form a Levit image; (k) comparing the original image and the Levis image to draw different portions between the images to form a stellar image; (l) transferring the separate image from the image transmitting unit to the image receiving unit; (m) re-compiling the Levit image by resynthesizing the disparate image and the original image in the image receiving unit; (n) displaying the Levit image on the image receiving unit. 18. The method according to claim 17, wherein the original image and the subsequence Levit image are stored in a working image memory in an image transfer unit. 20. The method of claim 18, further comprising the step of transferring the final image to the image transfer unit to the comparison image memory and to the working image memory when the sub-sequence Levit image is stored in the working image memory. Method for image transfer. 20. The method according to claim 19, wherein the image processor in the image transfer unit forms an extraordinary image by contrasting the image with the image in the comparison image memory and the image in the working image memory and determining the difference between the images. Way. 18. The method according to claim 17, wherein the original image is stored in the entire image memory of the image receiving unit. 22. The method according to claim 21, wherein the subsequence separate image is stored in the partial image memory of the image receiving unit. 23. The image receiving unit of claim 22, wherein the image processor in the image receiving unit synthesizes the dissimilar image in the partial image memory at a previous repeat of the image in the total image memory, thereby creating a new and Levised image and creating a new Levit image in the total image memory. And storing the superimposed image. 24. The method of claim 23, wherein the Levit image is displayed on an image receiving unit. 18. The method of claim 17, wherein sending additional image data requests comprises sending multiple image data requests for multiple image details. 27. The method of claim 25, wherein transmitting additional image details comprises transmitting multiple image details in response to multiple image data requirements. 27. The method of claim 26, wherein transmitting multiple image details comprises synthesizing multiple image details prior to transmission to an image receiving unit. 28. The method of claim 27, wherein transmitting the multiple image details comprises transmitting the image details in a series of blocks of cryptographic information. 18. The method according to claim 17, comprising storing, at the image transmitting unit, a coefficient of the total number of image details transmitted to the image receiving unit. 30. The method of claim 29, wherein transmitting additional image details comprises determining the total number of image details transmitted prior to the image receiving unit, transmitting the next image detail, and increasing the overall coefficients. Method for transmitting a superimposed image, characterized in that. In the superimposed image data transmission system, (a) an image transfer unit having a memory for storing the original image and a subsequence corrected image of the original image; (b) image processing means for an image transfer unit that compares an original image with a Levis image to create a different image; (c) an image receiving unit having an image display; (d) communication means for linking the image receiving unit and the image transmitting unit to transmit the original image and the other image to the image receiving unit; and (e) an image processing unit in an image receiving unit which reconstructs the Levit image by combining the original image and the dissimilar image. 32. The superimposed image data transfer system according to claim 31, further comprising an image separation unit in an image transmission unit that decomposes an image prior to transmission to the image reception unit. 33. The superimposed image data transfer system according to claim 32, wherein said image receiving unit comprises means for recombination reconstructed images prior to transmission. In a multi-resolution transmission system for superimposed image data, the system comprises: (a) an image transfer unit having a memory for storing original images and subsequence Levit images; (b) image comparison means for the image transfer unit, which determines a different portion between the original image and the sub-sequence Levi's image to generate a different image; (c) an image transfer unit having a memory for storing a decomposed image in an information block; (d) image decomposing means for decomposing the image into one or more image details and the base image sequentially synthesized with the base image to create a detail image of an increasingly higher resolution; (e) an image receiving unit having an image display; (f) communication means for linking the image receiving unit and the image transmitting unit; (g) an image receiving unit having an image transmitting unit responsive to the image data request to send image data to the image receiving unit to a separating unit which starts with the base image and progresses through the image detail incrementally until the final image detail reached. Requesting means for sending an image data request from the image transmission unit; (h) image processing means in the image receiving unit, which combines the image and the base image to create a progressively higher resolution detail image with the addition of each image detail; (i) resetting means for the image receiving unit to close the image transmission sequence and notify the image transmission unit in a ready state for receiving another image; (j) a multi-resolution transmission system comprising an image processing unit in an image receiving unit which synthesizes an original image and a different image to reproduce a Levit image.